1 /* -----------------------------------------------------------------------------
2 * See the LICENSE file for information on copyright, usage and redistribution
3 * of SWIG, and the README file for authors - http://www.swig.org/release.html.
7 * SWIG Configuration File for Lua.
8 * This file is parsed by SWIG before reading any other interface file.
9 * ----------------------------------------------------------------------------- */
11 /* -----------------------------------------------------------------------------
13 * ----------------------------------------------------------------------------- */
15 %include <luatypemaps.swg> /* The typemaps */
16 %include <luaruntime.swg> /* The runtime stuff */
18 //%include <typemaps/swigmacros.swg>
19 /* -----------------------------------------------------------------------------
21 * ----------------------------------------------------------------------------- */
22 // this basically adds to a table of constants
23 %typemap(consttab) int, unsigned int, short, unsigned short, long, unsigned long, unsigned char, signed char, bool, enum SWIGTYPE
24 { SWIG_LUA_INT, (char *)"$symname", (long) $value, 0, 0, 0}
26 %typemap(consttab) float, double
27 { SWIG_LUA_FLOAT, (char *)"$symname", 0, (double) $value, 0, 0}
29 %typemap(consttab) long long, unsigned long long, signed long long
30 { SWIG_LUA_FLOAT, (char *)"$symname", 0, (double) $value, 0, 0}
32 %typemap(consttab) const long long&, const unsigned long long&, const signed long long&
33 { SWIG_LUA_FLOAT, (char *)"$symname", 0, (double) *$value, 0, 0}
35 %typemap(consttab) char *, const char *, char [], const char []
36 { SWIG_LUA_STRING, (char *)"$symname", 0, 0, (void *)$value, 0}
38 // note: char is treated as a seperate special type
39 // signed char & unsigned char are numbers
40 %typemap(consttab) char
41 { SWIG_LUA_CHAR, (char *)"$symname", (long)$value, 0, 0, 0}
43 %typemap(consttab) long long, unsigned long long
44 { SWIG_LUA_STRING, (char *) "$symname", 0, 0, (void *)"$value", 0}
46 %typemap(consttab) SWIGTYPE *, SWIGTYPE &, SWIGTYPE []
47 { SWIG_LUA_POINTER, (char *)"$symname", 0, 0, (void *)$value, &$1_descriptor}
49 // member function pointers
50 %typemap(consttab) SWIGTYPE (CLASS::*)
51 { SWIG_LUA_BINARY, (char *)"$symname", sizeof($type), 0, (void *)&$value, &$1_descriptor}
54 /* -----------------------------------------------------------------------------
55 * Overloaded operator support
56 * ----------------------------------------------------------------------------- */
57 // lua calls the + operator '__add'
58 // python likes to call it '__add__'
59 // Assuming most SWIGers will probably use the __add__ if they extend their classes
60 // we have two sets of renames
61 // one to rename the operator+() to __add()
62 // (this lets SWIG rename the operator overloads)
63 // another is to rename __add__() to __add()
64 // (this means that people who wrote SWIG code to do that add will also work)
67 // this is extra renaming for lua
68 // not all operators are supported, so only those that are, are listed
69 %rename(__add) *::operator+;
70 %rename(__sub) *::operator-;
71 %rename(__mul) *::operator*;
72 %rename(__div) *::operator/;
73 %rename(__unm) *::operator-();
74 %rename(__unm) *::operator-() const;
76 %rename(__eq) *::operator==;
77 %ignore *::operator!=; // note: Lua does not have a notequal operator
78 // it just uses 'not (a==b)'
79 %rename(__lt) *::operator<;
80 %ignore *::operator>; // ditto less than vs greater than
81 %rename(__le) *::operator<=;
82 %ignore *::operator>=; // ditto less than vs greater than
83 %ignore *::operator!; // does not support not
85 %rename(__call) *::operator(); // the fn call operator
87 // lua does not support overloading of:
88 // logical/bitwise operators
91 // therefore ignoring them for now
92 // it also doesn't support non class operators
93 // eg friends or XX operator+(XX,XX)
95 // note: some of these might be better to rename, but not doing that for now
96 %ignore *::operator&&; %ignore operator&&;
97 %ignore *::operator||; %ignore operator||;
98 %ignore *::operator+=;
99 %ignore *::operator-=;
100 %ignore *::operator*=;
101 %ignore *::operator/=;
102 %ignore *::operator%=;
103 %ignore *::operator++; %ignore *::operator--;
105 %ignore *::operator=; // note: this might be better to rename to assign() or similar
113 %ignore operator>; %ignore operator>=;
114 %ignore operator<; %ignore operator<=;
115 %ignore operator==; %ignore operator!=;
118 // renaming the python operators to be compatible with lua
119 // this means that if a developer has written a fn __add__()
120 // it will be used for the lua +
121 %rename(__add) *::__add__;
122 %rename(__sub) *::__sub__;
123 %rename(__mul) *::__mul__;
124 %rename(__div) *::__div__;
125 %rename(__unm) *::__neg__; // lua calls unary minus,'unm' not 'neg'
126 %rename(__tostring) *::__str__; // both map to __tostring
127 %rename(__tostring) *::__repr__; // both map to __tostring
130 %rename(__pow) *::__pow__; // lua power '^' operator
131 %rename(__concat) *::__concat__; // lua concat '..' operator
132 %rename(__eq) *::__eq__;
133 %rename(__lt) *::__lt__;
134 %rename(__le) *::__le__;
135 %rename(__call) *::__call__; // the fn call operator()
137 // the [] operator has two parts, the get & the set
138 %rename(__getitem) *::__getitem__; // the v=X[i] (get operator)
139 %rename(__setitem) *::__setitem__; // the X[i]=v (set operator)
145 /* ------------------------------------------------------------
147 * ------------------------------------------------------------ */
148 /* Confession: I dont really like C++ exceptions
149 The python/lua ones are great, but C++ ones I dont like
150 (mainly because I cannot get the stack trace out of it)
151 Therefore I have not bothered to try doing much in this
153 Therefore currently its just enough to get a few test cases running ok
155 note: if you wish to throw anything related to std::exception
156 use %include <std_except.i> instead
159 // number as number+error
160 %typemap(throws) int,unsigned int,signed int,
161 long,unsigned long,signed long,
162 short,unsigned short,signed short,
164 long long,unsigned long long,
165 unsigned char, signed char,
166 int&,unsigned int&,signed int&,
167 long&,unsigned long&,signed long&,
168 short&,unsigned short&,signed short&,
170 long long&,unsigned long long&,
171 unsigned char&, signed char&
172 %{lua_pushnumber(L,(lua_Number)$1);SWIG_fail; %}
174 %typemap(throws) bool,bool&
175 %{lua_pushboolean(L,(int)($1==true));SWIG_fail; %}
177 // enum as number+error
178 %typemap(throws) enum SWIGTYPE
179 %{lua_pushnumber(L,(lua_Number)(int)$1);SWIG_fail; %}
181 // strings are just sent as errors
182 %typemap(throws) char*, const char*
183 %{lua_pushstring(L,$1);SWIG_fail;%}
185 // char is changed to a string
186 %typemap(throws) char
187 %{lua_pushfstring(L,"%c",$1);SWIG_fail;%}
190 Throwing object is a serious problem:
191 Assuming some code throws a 'FooBar'
192 There are a few options:
193 - return a pointer to it: but its unclear how long this will last for.
194 - return a copy of it: but not all objects are copyable
195 (see exception_partial_info in the test suite for a case where you cannot do this)
196 - convert to a string & throw that
197 its not so useful, but it works (this is more lua like).
198 The third option (though not nice) is used
199 For a more useful solution: see std_except for more details
202 // basic typemap for structs, classes, pointers & references
203 // convert to string and error
204 %typemap(throws) SWIGTYPE
205 %{(void)$1; /* ignore it */
206 lua_pushfstring(L,"object exception:%s",SWIG_TypePrettyName($1_descriptor));
209 // code to make a copy of the object and return this
210 // if you have a function which throws a FooBar & you want SWIG to return a copy of the object as its error
211 // then use one of the below
212 // %apply SWIGTYPE EXCEPTION_BY_VAL {FooBar};
213 // %apply SWIGTYPE& EXCEPTION_BY_VAL {FooBar&}; // note: need & twice
214 %typemap(throws) SWIGTYPE EXCEPTION_BY_VAL
215 %{SWIG_NewPointerObj(L,(void *)new $1_ltype(($1_ltype &) $1),$&1_descriptor,1);
218 // similar for object reference
219 // note: swig typemaps seem a little confused around here, therefore we use $basetype
220 %typemap(throws) SWIGTYPE& EXCEPTION_BY_VAL
221 %{SWIG_NewPointerObj(L,(void *)new $basetype($1),$1_descriptor,1);
225 // note: no support for object pointers
226 // its not clear how long the pointer is valid for, therefore not supporting it
228 /* -----------------------------------------------------------------------------
230 * ----------------------------------------------------------------------------- */
231 // this %define is to allow insertion of lua source code into the wrapper file
232 #define %luacode %insert("luacode")
235 /* ------------------------------ end lua.swg ------------------------------ */